微胶囊植物精油对白羽肉鸡生长性能、肠道微生物和血清生化指标的影响OA

The aim of this experiment was to investigate the effects of microencapsulated plant essential oils on the growth performance,gut microbiota,and serum biochemical indicators of white feathered broiler chickens,as well as whether microencapsulated plant essential oils can effectively replace Virginiamycin.900 1-day-old Ross 308[(42.66±1.53)g]white feathered broiler chickens were selected for the experiment and randomly divided into 5 groups,with 6 replicates in each group and 30 chickens per replicate.The negative control group was fed a basic diet,while the positive control group was supplemented with 20 g/t Virginiamycin(VM group).Three experimental groups were supplemented with 50,100 g/t,and 150 g/t microencapsulated plant essential oils(EO1,EO2,and EO3 groups),respectively.The experiment lasted for 42 days.The results showed that:①compared with the negative control group,the average daily weight gain of the VM group and the experimental groups significantly increased(P<0.05).② Compared with the negative control group,both the VM group and each experimental group were able to significantly reduce the total aerobic bacterial count,Escherichia coli count,and Salmonella count in each segment of the intestine(P<0.05).Meanwhile,the number of Lactobacilli in the experimental group was significantly higher than that in the VM group in each segment of the intestine(P<0.05).③ Compared with the negative control group,the VM group showed a sig-nificant increase in ALT,AST activity,and TP content(P<0.05),while the GSH-Px activity was signifi-cantly reduced(P<0.05).However,the ALT,AST activity,TP,and BUN content in each experimental group were significantly reduced(P<0.05),while the T-SOD activities were significantly increased(P<0.05).In addition,the levels of ALT,AST,TP,and BUN in each experimental group were significantly lower than those in the VM group(P<0.05),while the activities of GSH-Px and T-SOD were significantly higher than those in the VM group(P<0.05).In summary,adding 50-150 g/t microencapsulated plant essential oils to the basic diet of broiler chickens can effectively replace 20 g/t Virginiamycin,significantly increase average daily weight gain,inhibit harmful bacteria in the intestine,improve Lactobacillus flora,protect the liver,enhance antioxidant capacity,and improve protein utilization efficiency.